/Engine/Source/Runtime/InteractiveToolsFramework/Public/BaseTools/MeshSurfacePointTool.h
Do hover hit-test
virtual [FInputRayHit](API\Runtime\InteractiveToolsFramework\FInputRayHit) BeginHoverSequenceHitTest ( const [FInputDeviceRay](API\Runtime\InteractiveToolsFramework\FInputDeviceRay) & PressPos )